Hi Nonoka,

I wanted to provide some information regarding your request.

Please refer to this knowledge base article that will help you troubleshoot and identify where the issue is.
https://us-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=225924150079994&page=1&position=0&q=225924150079994

There are Doc links at the bottom of the article you will want to review.

Essentially when X3 sends an email it generates certain files, the existence and details of some of these files will indicate if X3 is generating the email and if there are any errors while sending.

If you need additional assistance after reviewing the KB article please feel free to create a support case so we can get together and help you.

Thanks